I don't know about 1974, but I do remember many years of preload before PAS, preload "assist" system.
Preload now is much easier than days past, all package cars have uniform load designations, and the package comes with the load sequence on the box...awesome.
Granted, each truck has it's own unique load and has to be adjusted, but In general, it's easier.
$37 per hour, well, FT is higher than that so.....?
Do you think PT would be remotely close to that with all the benefits?
What PT jobs pay that with bennies?